Device for tightening pendant bows of watches



April 1 1924.

A F. ROBBINS DEVICE FOR TIGHTENING PENbANT BOWS OF WATCHES Filed Sept.30.

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Patented Apr. 1, 1924.

UNHTEE S ALBERT 1 ROBBINS, O1? W'ALTHAlvI, MASSACHUSETTS.

DEVICE FOR TIGHTENING PENDANT BOWS OF WATCHES.

Application filed September 30, 1922.

To (ZZZ whom it may concern v Be it known that I, ALBERT l lionnins, acitizen of the United States, residing at VValthani, in the county ofMiddlesex and State of liiassachus'etts, have invented new and usefulImprovements in Devices for 'lightening Pendant Bows of Watches of whichthe following is a specification.

This invention relates to a device for tightening pendant bows ofwatches and has for its object to provide a device of sim pleconstruction particularly adapted to support and position the pendantbow of a watch and also force the opposite extremities of said bow intothe openings provided therefor in the pendant of said watch.

The invention consists in the combination and arrangement of parts setforth in the following specification and particularly pointed out in theclaims thereof.

Referring to the drawings:

Figure 1 is a front elevation of a device embodying the invention, awatch being illustrated in connection therewith, and

Fig. 2 is a central vertical section partly in elevation taken ontheline 2-2 of Fig. 1.

Like numerals refer to like parts throughout the several views of thedrawings.

In the drawings, 5 represents a casing of a watch from which projects apendant 6 which is fastened to said casing in any suitable manner. A how7 of suitable design is pivotally mounted upon the pendant 6 and saidhow is provided with ears 8 formed integral therewith at the oppositeextremities thereof which project into oppositely disposed openings 9provided in said pendant. A stem 10 extends from the interior of thecasing 5 through the pendant 6 and has a crown 11 rigidly fastenedthereto at the outer end thereof in the usual well known manner.

It is not customary in constructing watches to provide any means forpositively holding the ears 8 of the bow 7 within the openings 9 of thependant 6 and it is, therefore, necessary to rely entirely upon thestrength of the material of which said bow is constructed to prevent theopposite extremities thereof from spreading and thereby becomingdetached from said pendant. It is, therefore, important that when thewatch is first constructed and atall times thereafter that theextremities or cars 8 shall be tight within their respective openings.It has been customary heretofore in Serial No. 591,506.

applying the bow to the pendant and at such times thereafter that it isnecessary to tighten said how to employ pinchers but instruments of thischaracter are unsatisfactory and there is considerable danger ofdefacing and inarring the watch when they are used.

The device of this invention is provided for the special purpose offorcing the extremities of the bow into the openings provided thereforin the pendant of the watch in a practical and easy manner and withoutdanger of in any way marring the portions of the article with which itis brought in contact and is as follows :A bifurcated member 12 isprovided with furcations 13 at the outer extremities of which areprovided notches 14.. Slidably mounted within an opening 15 in themember 12 and projecting a short distance outwardlythere from at a pointintermediate the furcations 13 is a member 16 and the latter isshouldered at 17 to provide a reduced portion 18. A spring 19 surroundsthe reduced portion 18 of the sliding member 16 within the opening 15,one end of said spring bearing against the shoulder 17 of the member 16and the other end of said spring bearing against a shoulder20 formedwithin the member 12. The reduced portion 18 of the member 16 hasscrew-threads provided thereon which engage similar screw threads formedwithin a bushing 21, the latter being rigidly secured in any suitablemanner within an opening 22 provided within a handle 23. A support 24constructed in the form of a hook is provided with a screw-threadedportion 25 which has engagement. with the sliding member 16 and theposition of the hooked portion. of the support 2 1 relatively to theouter extremity of the sliding member 16 is adjusted by rotating saidsupport in the proper direction within said sliding member 16. Thesupport 24: is provided for the purpose of engaging the bow 7 asillustrated in the drawings and thereby holding the watch in a positionto be engaged by the furcations 13 and it will be noted that when thewatch is correctly positioned with relation to the device, that thelongitudinal median line of-the stem 10, crown 11, support 24;, slidingmember 16 and handle 23 are all coincident.

The general operation of the device is as follows :Assuming that the how7 of the watch has become loosened within the pendant6 or, in otherwords, that the extremities of the ears 8 of said bow have spread andare not in contact with the bottom of the openings 9 provided thereforin said pendant, the bow is placed upon the hook portion of the support24% and the handle 23 is then rotated in the proper direction to drawthe sliding member 16 toward said handle with in the bifurcated member12 untii the portions of the bow upon opposite sides of the support 24are brought into the notches 14 and contact with the portion of thefurcations 13 at the bottom of said notches. The bow 7 is now correctlypositioned, and by still further rotating the handle 23 in the samedirection as formerly, pressure will be applied upon said how which willtend to force the opposite extremities of said bow inwardly toward eachother until said e:1 tremities finally contact ti htly with the bottomof the openings 9. The watch is then released by rotating the handle 23in a reverse direction until it is possible to remove the bow 7 of thewatch from the support 24. With this device, the bow is tightened veryquickly and efficiently without any danger of in any way marring thesurface of the bow and without danger of the device becomingaccidentally detached from the bow during the tightening operation andcontacting with the highly polished surface of the watch casing 5.

I claim:

1. A device of the character described comprising, in combination, asupport for a pendant bow, a bifurcated member adapted i to engage saidbow upon opposite sides of said support to position said bow relativelyto said support, means to normally force said support and bifurcatedmember in opposite directions, and means to move said support relativelyto said positioning means to force the extremity of said bow in oppositedirections.

2. A device of the character described comprising, in combination, asupport for a pendant bow, a bifurcated member adapted to sliderelatively to said support and en: gage said bow upon opposite sides ofsaid support to position said bow relatively to said support, a yieldingmember interposed between said bow support and said bifurcated memberand normally forcing the same in oppositedirections, and means also tomove said support relatively to said positioning means to force theextremities of said bow toward each other.

3. A device of the character described comprising, in combination, asupport for a pendant bow, a bifurcated member provided with notchesformed therein to receive said bow and adapted to slide relativeto saidsupport and engage said how upon opposite sides of said support toposition said bow relatively to said support, a spring interposedbetween said support and said bi furcated member, and means also'to movesaid support relatively to said positioning means to force theextremities of said bow toward each other.

4:. A device of the character described comprising, in combination, asupport for a pendant bow, bifurcated member provided with notchesformed therein to receive bow and adapted to engage said how uponopposite sides of said support to po sition said b relatively to saidsupport, a member slidably mounted within said hifurcated member andoperatively connected to said bow support and means engaging saidslidable member and adapted to move the latter together with said howsupport relatively to said bifurcated member to force the extremities ofsaid how toward. each other.

5. A device of the character described comprising, in combination, asupport fora pendant bow, a bifurcated in with notches formed therein toreceive said bow and adapted to engage said bow upon opposite sides ofsaid support to position said bow relatively to said support, a memberslidably iounted within said bifurcated member and having screw-threadedengagement with said bow support and a handle having screw-threadedengagement with said slidable member and adapted to be rotated to movethe latter together with said how support relatively to said bifurcatedmember to force the extremities of said bow toward each other,

6. A device of the character described comprising, in combination, asupport for a pendant bow, bifurcated memb r provided with notchesformed therein to receive said how and adapted to engage said how uponopposite sides of said support to'position said bow relatively to saidsupport, a member slidably mounted within said bifurcated member andoperatively connected to said bow support, a spring interposed betweensaid slidable member and said bifurcated member and a handle havingscrew-threaded engagement with said slidable member and adapted to berotated to move the latter t0- gether with said bow support relativelyto said bifurcated member to force the ex-' treinities of said bowtoward each other.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

ALBERT F. ROBBINS,

Witnesses:

FRANKLIN E. Low, HAZEL F. LA Moose,

mber provided

